I bought a 99 4runner with the 6spoke 16" chrome rims and the front set has about I'd say about 10 years of baked on brake dust. The previous owner obviously never cleaned or rotated the wheels, as the rear tires were totally spent and the fronts still have about half their tread! The worst part of the rim is the inside, the part that rotates around the rotor and catches the majority of the dust.. the surface has all these tiny grooves and the dust in settled in there and baked on. These are the products I've tried so far.. colonel brassi's metal cleaner, simple green, spray on rim cleaner, brillo pads (which made the most progress i think, but still far from clean), pb blaster, wd40 and blue magic. Is there a magic product out there? Or do I just need to scrub for days on end? I can post a picture if that would help. Thanks in advance for any advice from someone who may have been through this already